Two batches of EP Kaolin tested quite differently in 2018

Monday 27th May 2019

The EP insight-live.com/material/925">kaolin has been mixed 70:30 with nepheline syenite. This creates a body that matures below cone 6. And it enables comparing the degree to which the two kaolins influence vitrification (and their contribution to fired color in a vitreous body). The darker one is more plastic, has higher drying shrinkage more soluble salts. These dry test bars were fired at cone 4-8 and had similar fired shrinkages and porosities. However, the one on the right fired whiter at all temperatures. These differences would impact the plasticity and drying shrinkage of bodies containing a significant percentage of the material. They would also influence the ability of this kaolin to suspend slurries.

Pages that reference this post in the Digitalfire Reference Library:

EP Kaolin, What makes EP Kaolin unique? Are others as good?

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